Implementations

Write

• Mapnik's grid_renderer (Uses Antigrain Geometry library for rendering).
• Various python sample implementations: https://github.com/springmeyer/utfgrid-example-writers
• GeoScript groovy example
• TileStache
• create-utfgrids

Read

• Wax for adding support to the Leaflet, Modest Maps, OpenLayers, and Google Maps clients: code
• Leaflet.utfgrid
• OpenLayers Native: blog post, general demo, example multi-grid, example geography-class
• GDAL MBTiles support: http://www.gdal.org/frmt_mbtiles.html
• landez : https://github.com/makinacorpus/landez (landez.reader python module)

Servers

• TileMill - via tilelive.js which uses tilelive-mapnik to request grid creation and node-mbtiles to cache and fetch grids stored in MBTiles format.
• TileStache's TileStache.Goodies.Providers.MapnikGrid:Provider
• django-mbtiles which serves grids stored in MBTiles along with tiles using a simple template tag.